Carriage-shaft tip



(No Model.)

lUNrrnn Stearns 'Partnr Critics.

ARTHUR Il. HOW'ARD, OF NEV HAVEN, ASSIGNOR TO VOODRUFF, MILLER 'da CO., OF MOUNT CARMEL, CONNECTICUT;

CARRIAGE-SHAFT TP.

SPECIFICATION Aforming part of Letters Patent No. 315,787, dated April 14, 1885.

(No model) To @ZZ whom it may concern.-

Be it known that I, ARTHUR L. HOWARD,

a citizen of the United States of Anie-rica, re-

. siding at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in CarriageShaft Tips, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in the construction of carriage-shaft tips.

The invention consists in constructing the shaft-tip ofy taper form from a single piece of sheet metal, without seam or join, and with its forward end and wearing-point of greater thickness than the remaining portion.

In the accompanying drawings I have shown the die and punch, and also the article from which I prefer to form my improved tip, and I have also herein described such method of manufacture; but I lay no claim thereto in the present application, as the die and punch are the subject of another application for Letters Patent led February 29, 1884, Serial No. 122,472. Y

In the accompanying drawings, Figure l represents a vertical section of a sheetmetal cup as ordinarily constructed. Fig. 2 represents a vertical section of the said cup after drawing. Fig. 3 represents a vertical section of the die, with the shell or thimble resting therein in readiness for being forced within said die and formed into a tip in accordance with my improvement. Fig. 4 represents a vertical section of the die, plunger, thimble or tip, and extracting-tool, the plunger and thinible or tip being shown in position at the completion of the forming of the tip, andthe extracting-tool as about to enter the die. Fig.

4,0 5 represents aside elevation of a finished tip.v

Fig. 6 represents a vertical section of a sheetinetal tip of the usual construction-that is to say, of equal thickness throughout.

Heretoi'ore, as far as I am aware, thimbles or tips for carriage shafts have either been cast, or formed of sheet metal of equal thickness throughout, no provision being made for constructing the front end and sides, upon which the most wea-r cornes, stronger or thicker 5o than the remaining portion; also, heretofore where such tips have been constructed of sheet metal they have been folded, not drawn, into shape. Then the tip has been cast, the interior 'has a rough surface formed by the sandmold, and there has consequently been some dificulty in fitting the same to the shaft, and when the tips are cast they have, owing to their noirductility, often split or broken while being driven into position on shafts, while my tip, being constructed of sheet metal, will eX- (Q0 pand without breaking.

I will first describe the cup from which I form myshaft-tip, and the manner in which it is adapted for use. I take for convenience a sheet-metal cup of the usual construction, as represented in Fig. l of the accompanying drawings, and draw the same to the lengt-h it is desired to make the tip by any of the known means for drawing sheet-metal articles. The cup as thus drawn is, as shown in Fig. 2 of the 70 drawings, so drawn from the closed end rearwardly that while the side walls are thinned out the outer or closed end remains of the same thickness as the original thickness of the cup. 7 5

The die and punch employed by ine in forming shaft tips or thinibles from elongated cups as above described are constructed as follows:

A represents the die, which is constructed with a central bore, B, which at each end is 8o for a part of its length of straight vertical form, as shown at c., and is of a gradual taper from the upper tothe lower straight portions, as shown at b.

By forming the die with a straight vertical 8 5 bore at its upper end a seat is formed, within which the cup A may rest steadily when receiving the impact of the plunger or punch,to he presently described. Were the bore B made of gradual taper from the top downward 9o the tip would not iit snugly therein, and consequently it would be driven unequally down within the bore on the descent of the plunger or punch.

C represents the cylindrical plunger or g5 punch, which is of less diamater than the small end of the tip.

Vhen the thimble or tip D is placed in position within the upper end of the bore B of the die A, as shown in Fig. 3, its walls are of 1ro straight form, and it is of equal circumference throughout its length, its extreme front end being of the original thickness of the cup A. The plunger or punch Gis then inserted within said thimble or tip, and forced down so as to force the thimble down within the tapered portion of the boreB of the die A, in the manlIOV ner shown in Fig. 4. vAs the thimble is thus forced along the tapering portion of the bore B, a correspondingly-tapering contour is imparted to said thimble, and as the lower or outer end of said thimble or tip is forced within the narrowest portion of the tapered bore the thick outer end will be forced around the lower end of the plunger or punch, and lapped or forced around so as to form the side wall of that portion of the tip immediately adja cent to the point thereof, the result being the production of a tip of gradual taper from end to end; and with the extreme end and side of the front end,upon which the most wear comes, of greater thickness than the remaining portion.

.E represents an extractor for removing the formed tip from the die A. The spindle or shank of this extractor is of a cylindrical circumference adapted to fit intov the lower straight end of the bore B, and has at its outer end a shoulder or enlarged portion, F. When the thimble or tip D has been formed, the punch C is removed from the bore B of the die A, .and the extractor E isvthen inserted within and pushed up the lower end of the bore B, and against .the outer end of the tip D, thereby forcing the vlatter up and out of the bore B. The'shoulder Facts as a stop to prevent the extractor passing entirely within the bore B of the die. B y thus constructing thimbles or tips for the shafts of carriages and other vehicles, that portion thereof upon which the greatest wear comes is greatly strengthened. They will last longer in use, can be subjected to rough usage without injury, will not be as liable to break or split in use or while being driven in position upon shafts as is the case where such tips are formed of equal thickness throughout. Theirinner surface will besmootler than when the tips are formed by casting. Consequently they can be the more readily attached in position without injury to the shafts, and by forming them of gradual taper they are adapted to t shafts of different sizes.

Having thus described my invention, what Iclaim isl. As a new article of manufacture,asheet metal carriage-shaft tip, having its outer end and wearing-point of greater thickness than the remaining portion, substantially as and for the purpose set forth. v

2. As a new article of manufacture, asheetmetal carriage-shaft tip of gradual taper exteriorly from its inner to its outer end, and having its outer endand wearing-point of greater thickness than the remaining portion, substantially as and for the purpose set forth.

In testimony whereof I affix Iny signature in presence of two Witnesses.

ARTHUR L. HOWARD. 

